A single borehole dilution technique to measure the hydrogeological properties of saturated landfilled waste


Rollinson, J., Rees-White, T., Barker, J.A. and Beaven, R.P. (2010) A single borehole dilution technique to measure the hydrogeological properties of saturated landfilled waste. In, Waste 2010 Conference, Stratford-upon-Avon, GB, 28 - 29 Sep 2010. 8pp, 105-112.

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Description/Abstract

A single borehole dilution test is a relatively simple hydrogeological technique used to determine the volumetric flow rate of groundwater through a borehole. The technique potentially provides a means to obtain hydrogeological properties without the need to undertake a pumping test, avoiding the logistical difficulties of such testing. The use of the technique in landfills has been explored by application in two landfills in south-east England, providing data to inform activities such as in-situ remediation. The tests used fluorescent dye tracers, rhodamine WT and sodium fluorescein, with concentrations monitored using submersible fluorimeters. Results from nine dilution tests gave average Darcy velocities (volumes per unit area per unit time) ranging over two orders of magnitude: 2.6 x 10-3 to 2.8 x 10-1 m/day. Hydraulic conductivities, inferred using estimated hydraulic gradients, ranged from 6.7 x 10-2 to 7.1 m/day (7.7 x 10-7 m/s to 8.3 x 10-5 m/s) and compared favourably with pumping test data. The tests revealed zones of preferential flow and zones of negligible flow.

Item Type: Conference or Workshop Item (Paper)
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Divisions: Faculty of Engineering and the Environment
ePrint ID: 342209
Date Deposited: 15 Aug 2012 15:59
Last Modified: 27 Mar 2014 20:24
URI: http://eprints.soton.ac.uk/id/eprint/342209

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